California 364 Million Medicare Services: Top 10 US States by Procedure Volume

Findings

California leads at 364 million Medicare services

PlainProcedure's states dataset records California at 363,973,065 total Medicare Part B services, the highest of all 56 states and territories. Florida follows at 347,640,147 services and Texas at 273,872,623.CMS Medicare Physician and Other Practitioners, By Provider and Service, 2023 New York adds 192,534,666 services, Illinois 178,358,259, and Pennsylvania 146,058,795. The ranking tracks state population closely, which is expected for a Medicare service-volume measure: more residents over 65 produce more billed encounters. State pages expose the per-state service, provider, and payment columns for direct comparison.

California's 15,736 Medicare providers and 378 reporting hospitals generate its volume lead, while Florida reaches its 348M services through 13,744 providers and 222 hospitals.CMS Medicare Part B National Summary Data Files, 2023 Texas carries the largest reporting-hospital count among the leaders at 465, spread across 11,933 providers. The provider and hospital counts confirm that volume leadership rests on the size of each state's Medicare delivery network rather than on unusually high per-provider billing.

The top three states deliver 985 million services combined

California, Florida, and Texas together account for 985,485,835 Medicare Part B services. Against the national total of roughly 3.28 billion services across all 56 states and territories, the top three states represent close to 30 percent of all Medicare physician-service volume.CMS Medicare Physician and Other Practitioners, By Provider and Service, 2023 That concentration mirrors the three states' combined share of the US population aged 65 and over, reinforcing that Medicare volume is fundamentally a demographic-scale measure.

The concentration has practical consequences for anyone studying Medicare cost patterns: changes in billing practice, fee schedules, or utilization in California, Florida, and Texas move the national aggregate more than changes in any other set of states. New York at 193M and Illinois at 178M extend the high-volume tier, but the gap between the top two states and the rest of the field is substantial, with California and Florida each clearing 340M services while no other state reaches 300M. Data methodology documents the verbatim ingestion of the state rollup columns from the CMS source.

Average Medicare payment per service ranges from $281 to $347 across the leaders

Ranking the high-volume states by average Medicare payment per service shows California highest at $347, followed by Florida at $320 and New York at $313.CMS Medicare Physician and Other Practitioners, By Provider and Service, 2023 Texas averages $304, Pennsylvania $285, and Illinois $281. The spread of roughly $66 between the highest and lowest of these leaders reflects differences in procedure mix and specialty concentration rather than a single state paying more for an identical service, since Medicare fee schedules are set nationally with limited geographic adjustment.

The combination of volume and per-service payment explains where Medicare dollars concentrate. California leads on both axes, pairing the highest service volume with the highest average payment, which compounds its share of total Medicare spending. Florida pairs the second-highest volume with the second-highest average payment, while Texas delivers high volume at a more moderate $304 average. For patients and analysts, the state pages let you drill from these aggregates into per-procedure and per-hospital detail to see how a specific code's payment varies by state.CMS Medicare Coverage Database, Procedure Code Lookup, 2023 Hospital directory links the facility-level reporting behind each state's totals, and the procedure profiles show national context for any code referenced in these state rollups.